HttpWebRequest问题:系统缺少足够的缓冲区空间或因为队列已满

时间:2013-06-18 11:44:23

标签: c# asp.net .net httpwebrequest socketexception

我正在使用服务以XML文档的形式提取酒店列表。所有这些在我们的开发服务器上进行测试时都可以正常工作,但是在部署它之后很短,所有使用它的页面都被破坏并显示此错误:

An operation on a socket could not be performed because the system lacked
sufficient buffer space or because a queue was full 91.103.175.187:80

Description: An unhandled exception occurred during the execution of the current
web request. Please review the stack trace for more information about the error
and where it originated in the code. 

Exception Details: System.Net.Sockets.SocketException: An operation on a socket
could not be performed because the system lacked sufficient buffer space or
because a queue was full 91.103.175.187:80

Stack Trace: 

[SocketException (0x2747): An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full 91.103.175.187:80]
   System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) +305
   System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) +699

[WebException: Unable to connect to the remote server]
System.Net.HttpWebRequest.GetResponse() +7859156
Laterooms.Gateway.LateroomsGateway.GetHotelsWithurl(String url)
Laterooms.Gateway.LateroomsGateway.GetHotelsByKeyword(String keyword, String orderBy) 
Laterooms.LateroomsManager.GetHotelsByKeyword(String keyword, String orderBy, String lang)

看到这个之后,我认为这可能是由于请求的数量,所以我实施了缓存,但仍然发生了相同的问题。这是我用来输入数据的代码:

    HttpWebRequest request = null;

    Uri uri = new Uri(url);
    request = (HttpWebRequest)WebRequest.Create(uri);
    request.Method = "POST";
    request.AllowWriteStreamBuffering = false;
    request.ContentLength = 0;
    request.KeepAlive = false;

    using (WebResponse response = request.GetResponse())
    {
        using (Stream dataStream = response.GetResponseStream())
        {
            _LateroomsXml.Load(dataStream);
        }
    }

此问题再次发生在我们的实时服务器上。经过几个小时的调试和谷歌搜索,我没有更接近解决这个问题。

对此的任何帮助将不胜感激!

2 个答案:

答案 0 :(得分:10)

请不要使用该修复程序。您的问题是您已禁用alives,因此它为每个请求使用不同的连接,然后在几分钟内无法再次使用该端口。它正在做它应该做的事情。

启用保持活动状态,您的问题就会消失。

答案 1 :(得分:3)

我最终找到了解决这个问题的方法以防万一其他人被卡住了!

来自here

https://support.microsoft.com/en-us/kb/196271

  1. 启动注册表编辑器。

  2. 在注册表中找到以下子项,然后单击“参数”: HKEY_LOCAL_MACHINE \ SYSTEM \ CURRENTCONTROLSET \服务\ TCPIP \参数

  3. 在“编辑”菜单上,单击“新建”,然后添加以下注册表项:

    值名称:MaxUserPort

    值类型:DWORD

    值数据:65534

    有效范围:5000-65534(十进制)

    默认值:0x1388(十进制5000)

  4. 退出注册表编辑器,然后重新启动计算机。

  5. 这结合了一些更好的缓存,因此每次用户加载页面时都不会提取数据,这样可以防止再次发生这种情况。